EP0269356A3 - Pulse modulated automatic light control utilising gated image intensifier - Google Patents

Pulse modulated automatic light control utilising gated image intensifier Download PDF

Info

Publication number
EP0269356A3
EP0269356A3 EP87310152A EP87310152A EP0269356A3 EP 0269356 A3 EP0269356 A3 EP 0269356A3 EP 87310152 A EP87310152 A EP 87310152A EP 87310152 A EP87310152 A EP 87310152A EP 0269356 A3 EP0269356 A3 EP 0269356A3
Authority
EP
European Patent Office
Prior art keywords
image intensifier
light control
automatic light
pulse modulated
gated
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP87310152A
Other languages
German (de)
French (fr)
Other versions
EP0269356A2 (en
Inventor
Thomas Morton Woolfolk
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Litton Marine Systems Inc
Original Assignee
Sperry Marine Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sperry Marine Inc filed Critical Sperry Marine Inc
Publication of EP0269356A2 publication Critical patent/EP0269356A2/en
Publication of EP0269356A3 publication Critical patent/EP0269356A3/en
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/70—Circuitry for compensating brightness variation in the scene
    • H04N23/75—Circuitry for compensating brightness variation in the scene by influencing optical camera components

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Transforming Light Signals Into Electric Signals (AREA)
  • Optical Radar Systems And Details Thereof (AREA)
  • Closed-Circuit Television Systems (AREA)
  • Exposure Control For Cameras (AREA)
  • Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)

Abstract

Automatic light control apparatus for a television camera system utilises a gated image intensifier (13) wherein a pair of laser diodes (CR1, CR3) illuminate, respectively, a pair of avalanche photodiodes (CR2, CR4) to apply switching voltages to the image intensifier (13). Low-level gating signals are utilised to activate the laser diodes (CR1, CR3) which are gated on and off in complementary fashion, whereby the image intensifier (13) is turned on for pulse intervals inversely proportional to the brightness of the scene being televised.
EP87310152A 1986-11-21 1987-11-18 Pulse modulated automatic light control utilising gated image intensifier Withdrawn EP0269356A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US93406886A 1986-11-21 1986-11-21
US934068 1986-11-21

Publications (2)

Publication Number Publication Date
EP0269356A2 EP0269356A2 (en) 1988-06-01
EP0269356A3 true EP0269356A3 (en) 1990-05-09

Family

ID=25464913

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87310152A Withdrawn EP0269356A3 (en) 1986-11-21 1987-11-18 Pulse modulated automatic light control utilising gated image intensifier

Country Status (2)

Country Link
EP (1) EP0269356A3 (en)
JP (1) JPS63138887A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL9000915A (en) * 1990-04-18 1991-11-18 Optische Ind De Oude Delft Nv DEVICE AND METHOD FOR CONTROLLING THE CONTRAST IN AN IMAGE AMPLIFIER PROVIDED WITH AN MCP IMAGE AMPLIFIER.
GB2329809B (en) * 1997-09-26 2001-10-31 Marconi Gec Ltd Camera arrangements
GB2408628A (en) 2003-11-28 2005-06-01 Imp College Innovations Ltd Gated image intensifier
US7315254B2 (en) * 2005-09-27 2008-01-01 Itt Manufacturing Enterprises, Inc. Proximity detector for night vision goggles shut-off

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3848085A (en) * 1973-08-07 1974-11-12 Us Army Low light level television camera
US4071752A (en) * 1976-05-07 1978-01-31 International Laser Systems, Inc. Self-synchronizing optical imaging system
US4202014A (en) * 1978-07-13 1980-05-06 Sperry Corporation Pulse modulated automatic light control
FR2564676A1 (en) * 1984-05-17 1985-11-22 Messerschmitt Boelkow Blohm Photosensor video camera device for e.g. missile

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3848085A (en) * 1973-08-07 1974-11-12 Us Army Low light level television camera
US4071752A (en) * 1976-05-07 1978-01-31 International Laser Systems, Inc. Self-synchronizing optical imaging system
US4202014A (en) * 1978-07-13 1980-05-06 Sperry Corporation Pulse modulated automatic light control
FR2564676A1 (en) * 1984-05-17 1985-11-22 Messerschmitt Boelkow Blohm Photosensor video camera device for e.g. missile

Also Published As

Publication number Publication date
JPS63138887A (en) 1988-06-10
EP0269356A2 (en) 1988-06-01

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Inventor name: WOOLFOLK, THOMAS MORTON